Shape Memory Response in Ni40Co10Mn33Al17 Polycrystalline Alloy

Wataru Ito; Burak Basaran; Rie Y. Umetsu; Ibrahim Karaman; Ryosuke Kainuma; Kiyohito Ishida

doi:10.2320/matertrans.MBW200903

Shape Memory Response in Ni₄₀Co₁₀Mn₃₃Al₁₇ Polycrystalline Alloy

Wataru Ito, Burak Basaran, Rie Y. Umetsu, Ibrahim Karaman, Ryosuke Kainuma, Kiyohito Ishida

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Keywords: nickel-cobalt-manganese-aluminum, martensitic transformation, magnetic shape memory alloy, pseudoelasticity, metamagnetic transition

JOURNAL FREE ACCESS

2010 Volume 51 Issue 3 Pages 525-528

DOI https://doi.org/10.2320/matertrans.MBW200903

View "Advance Publication" version (December 9, 2009).

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Abstract

Shape memory response of the polycrystalline Ni₄₀Co₁₀Mn₃₃Al₁₇ alloy were investigated. In the isobaric thermal cycling experiments, the measured transformation strain levels increased with increasing stress reaching about 3.6% under 200 MPa. The slope of the stress vs. transformation temperature diagram, constructed using the data from these experiments, almost coincided with the predicted one obtained using the Clausius-Clapeyron equation, and experimental entropy data and transformation strain. Perfect pseudoelasticity was observed up to 405 K during compressive straining up to 2.5%.

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